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un•think•ing

Pronunciation: (un-thing'king),[key]—adj.1. thoughtless; heedless; inconsiderate: an unthinking, tactless person.2. indicating lack of thought or reflection: a dull, unthinking expression on his face.3. not endowed with the faculty of thought: unthinking matter.4. not exercising thought; not given to reflection: This book will not profit an unthinking person.5. not thinking; unmindful: chores done in an unthinking manner.